Echo Cancellation on Mac Yosemite

[Enemy]

I'm having trouble enabling echo cancelation on Mac 10.10.3 (Yosemite), I've tried tweaking settings but the Echo option stays grey'd out.

http://i62.tinypic.com/24orgvm.png

[kissaki]

asked on IRC, result:

our coreaudio backend does not implement echo cancellation. in-mumble echo cancellation only possible with third-party driver software (soundflower, etc.) -- native mac echo cancellation is possible, but uses its own preprocessing pipeline -- so if used with Mumble, double preprocessing would occur. this is what hapens in the iOS client, so not too bad. it's something we want to implement, but haven't gotten to it yet.